Top plate for hot-air registers.



(Nn Model.)

Patented Nov.4 I3, |900.

n. B. rqAnwlcK 4@L H; s. HART. TOP PLATE FOR HOT AIB -REGISTERS (Application led Mar. 22, 190B.)

WiTNESSES:

NIW- l ATTORNEY 4o shown in Figs. 2, 3and 4 at E.

fDAvID'n. MARWCK AND nowARDs. HART, or onionoo, inLiNoIs.`

`I'OP PLATE FORHOT-AIR` REGISTERS.

SPECIFICATION `forming' part 0f Letterlsfatent N0. 661,515, dated November 13, 1900.

l Application filed March 22,1900. Seriallllo. 9,694. (No model.)

To a/ZZ whom it may concern:

Be it. known that we, DAVID B. MARWICK i and HOWARD S. HART, citizens of the United States, residing at Chicago, county of Cook, 5 Stale of Illinois, have invented certain new and useful Improvements in Top Plates for HotAir Registers, ofwhich the following is a full, clear, and exact description.

Our invention relates to improvements in xo the construction of the top plate of hot and Icold air registers and ventilators and analogous devices, and has for. its object the at- 'tainment of lightness, simplicity, economy of Y construction, and increased strength.

' 15 In the accompanying drawings, showing the preferred embodiment of our invention, Figure 1 is a plan view of the top plate of a register foruse with hot-air furnaces. Fig. 2 is a relatively-enlarged view of a portion of the 2o under side of the register. Fig. 3 is a section taken on the line 3 3, Fig. 2. Fig. 4 is a sectiontaken on the line 44, Fig. 2.

A is a plate, preferably of sheet metal.

" Through this plate we form lines of holes B B',

z5 preferably by means of a punch. These holes are preferably longitudinal. Between the holes re connecting portions C C. The lines of ho es are preferably so arranged that the holes, and consequentlythe connecting poro tions C also, are staggered. i

l It willl be obvious that ther weight of a person standing on the center of the register would be liable to break` the connecting por tions. To prevent this and to 'strengthen 3 5 these connecting portions, as well as the other parts of the .material around* the holes, we form downwardly-extending ribs at the sides of the holes, preferably by bending downwardly the metal at the sides of the holes, as

These bentdown portions formlribs which extend across or bridge the ends of the connectingportions, and therefore materially strengthen the same from a force tending to bend the metal on an 45 axis represented by the sectional line 3 3, Fig.2. Although in our construction the holes are very close together and the iop` plate therefore materially lightened, the construction is very strong. 5o We are aware that many changes may be made in the construction herein disclosed without departing from the spirit of our invention, and therefore we do notintend to limit ourselves to the particular construction herein shown and described.

From the foregoing it will be seen that by turning down the metal which is displaced in forming the perfor-ations (instead of cutting out and discardingsaid metal) we are enabled to strengthen and reinforce by corrugations the body of the top plate adjacent said perfor-ations. Otherwise the forming of perforations in the top plate would weaken'tlie same to such an extent that thinsheet metal could not be advantageously employed to this purpose.

It is apparent that the invention does not reside alone 'in corrugating the top plate Vfor the purpose of strengthening, but, on the contrary, it lies in producing anew article of manufacture-to wit, a top plate for registers or ventilators in which a portion of the metal is displaced' to form, first, perforations, and, second, strengthening ribs or corrugations.

What we claim is l. As a new article of manufacture, a top plate for registers and the like, said plate being formed of sheet metal and perforated to form bars therein, connections between' said bars, bridgingv portions integral wit,l said plate for reinforcing and Vstrengthenii g the same..

. 2. As a new article of manufacture, a top plate fo'r registers and the like-,said plate be- Iing formed of sheet metal 'and perforated to 4. As a new article of manufacture, a top plate for registers and the like, said plate being formed of sheetinetal and perforated to form bars therein, connections between said bars, said connections being located in staggered arrangelnent/,brid ging portions integral with said plate and adjacent said connecting IOO portions Lo reinforce and strengthen said many places to form in the metal a web-like plate. central portion, the webs being arched in 15 5. As a new article of man ufaoture, a top cross-section to reinforce and strengthen the plate for registers and the like said plate beplate at those portions that would otherwise 5 ing formed of sheet metal and perforated to be weakened by the perforating of the mateform cross-bars therein and also connections rial. p between said cross-bars, said connections be- Signed at Chicago, Illinois, this 17th day 2o ing located in staggered arrangement, and 0f March, 1900. bridges formed integral Wit-h said plate to reno inforce and strengthen the same.

6. As a new article of manufacture, a top plate for registers and the like, saidplate bein g; formed of sheet metal and perforated in i DAVID B. MARWICK.

. HOWARD S. HART.

Witnesses: i

THOMAS CUSTER, GUsT SUNDELL. 

